KR102556705B1 - Self-monitoring system and self-monitoring method - Google Patents

Abstract

The present invention relates to self-monitoring systems and methods. According to one embodiment of the present invention, a control unit for receiving and processing a monitoring signal for monitoring an operating system, an operating device or an operating member; a power unit supplying basic power to the control unit; a communication unit that transmits at least some or all of the monitoring signals processed by the control unit to the server unit; and a watch dog unit that monitors the supply of basic power and the operation of the control unit, and blocks data transmission to the server unit through the communication unit when an abnormality is detected. In addition, a self-monitoring method applied to the self-monitoring system is proposed.

Description

Self-monitoring system and method {SELF-MONITORING SYSTEM AND SELF-MONITORING METHOD}

The present invention relates to self-monitoring systems and methods. Specifically, it relates to a self-monitoring system and method for securing more enhanced reliability in monitoring for condition-based maintenance in an operating system.

In order to increase the safety and availability of systems and reduce maintenance costs in transportation devices such as railroad cars, power generation facilities, or other production facilities, condition-based maintenance (CBM) technology is being expanded and applied worldwide. Currently, the reliability-based maintenance method, which is performed at regular intervals, can cause over-maintenance, which is maintenance without failure, or a major problem can arise for failures that occur early due to product quality distribution.

On the other hand, condition-based maintenance technology monitors the status of major systems by installing sensors to diagnose defects early and predicts the remaining lifespan. Through predictive maintenance technology, accidents of operating equipment are prevented and costs due to unexpected failures are reduced. We are developing technology to save money.

In order to secure the reliability of such CBM technology, it is necessary to monitor the occurrence of errors in sensor signal processing or communication due to the influence of the surrounding environment, and to fundamentally block inaccuracies in diagnosis and prediction based on incorrect signals. .

Republic of Korea Patent Publication No. 10-2018-0070299 (published on June 26, 2018) Republic of Korea Patent Publication No. 10-2009-0091837 (published on August 31, 2009) Republic of Korea Patent Registration No. 10-0288748 (registered on February 10, 2001)

In order to solve the above problems, the present invention is to provide a technique for preventing errors from occurring as much as possible by configuring self-diagnosis monitoring in a monitoring system that acquires, processes, and transmits signals from various operating systems. An object of the present invention is to provide a technique for self-diagnosing and solving a problem when an error occurs in a control device that processes signals and controls transmission in an operating system due to the influence of the surrounding environment.

In order to achieve the above object, according to one aspect of the present invention, a control unit for receiving and processing a monitoring signal for monitoring an operating system, an operating device or an operating member; a power unit supplying basic power to the control unit; a communication unit that transmits at least some or all of the monitoring signals processed by the control unit to the server unit; and a watch dog unit that monitors the supply of basic power and the operation of the control unit, and blocks data transmission to the server unit through the communication unit when an abnormality is detected.

At this time, in one example, the watchdog unit operates by receiving separate power from the power unit, monitors the basic power supplied to the control unit, determines whether it is out of the set supply range, and checks whether the control unit is in a normal operating state. In each case where the basic power is out of the set supply range or the control unit is determined to be abnormally operated, a holding signal may be transmitted to the communication unit to block data transmission. In this case, the watchdog unit may reboot the control unit by transmitting a reset signal to the control unit upon determining an abnormal operation.
In one example, the control unit is provided to at least one sensor for detecting the state of the operating system, the operating device or operating member, or the state of supply power from a power supply unit provided to the operating system, operating device or operating member to be monitored, Among the monitoring signals, the digital conversion error of the analog signal is monitored, and when the monitoring result indicates that there is a problem with the supply power or a digital conversion error is determined, a holding signal is transmitted to the communication unit to block data transmission.
Blocking of data transmission by transmission of a holding signal to the communication unit is performed by a watchdog unit when the basic power supplied to the control unit is out of the set supply range or abnormal operation of the control unit, and at least one of the above If there is a problem with the supply power provided to the sensor or the monitoring object or the digital conversion error is determined, the control unit may perform each operation.
When the basic power supplied to the control unit is out of the set supply range and returns to the set supply range within the set supply time or the control unit operates normally after an abnormal operation, the watchdog unit and the communication unit by the control unit After the data transmission is blocked, when the problem of the supply power or the digital conversion error that caused the interruption is resolved, the control unit resets each communication unit to release the data transmission interruption state.

At this time, in another example, the watchdog unit has a separate counter, and the counter periodically receives a trigger signal from the control unit, and the watchdog unit controls when the counter does not receive a trigger signal within a set time range. It can be judged as abnormal operation of the unit.

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At this time, in one example, the self-monitoring system further includes an analog-to-digital conversion unit that digitally converts the analog signal transmitted for monitoring and transmits the digital signal to the control unit, and the control unit has a separate analog-to-digital converter built into the analog signal. -The digital conversion unit receives the analog signal that has not been digitally converted separately, converts it to digital, generates a comparison digital signal, and compares the digital conversion signal received from the analog-to-digital conversion unit and the comparison digital signal to find out if there is an error greater than the set range. In this case, it can be judged as a digital conversion error.

Further, in one example, the self-monitoring system may be applied for condition-based maintenance of an operating system, an operating device or an operating member in a transportation device, a power generation facility, or a production facility.

At this time, in one example, the transport device is a railroad car, and the self-monitoring system is a module for a condition-based maintenance system of a vehicle wheel set, a module for a condition-based maintenance system of a vehicle drive motor, and a condition-based maintenance of a vehicle air conditioner. It may be applied to any one or more of the system modules, respectively, or to an integrated system including at least two or more of them.

In another example, the server unit may display an abnormal signal or transmit an abnormal signal to a set manager terminal when communication with the communication unit is not established for a set time or longer.

And in order to achieve the above object, according to another aspect of the present invention, the basic power state supplied to the control unit that receives and processes the monitoring signal for monitoring the operating system, the operating device or the operating member, and the operation of the control unit A first monitoring step of monitoring a state in a watch dog unit operating with a separate power source; A data transmission step of transmitting at least some or all of the monitoring signals processed by the control unit in the communication unit to the server unit; and a transmission blocking step of blocking data transmission from the watchdog unit to the server unit through the communication unit when an abnormality in the supply of basic power and operation of the control unit is detected in the first monitoring step. do.

At this time, in one example, in the first monitoring step, it is determined whether or not the basic power supplied to the control unit is out of the set supply range, and the set time of the trigger signal periodically received from the control unit. It is possible to determine whether the operation of the control unit is abnormal based on whether reception is within the range, and in the step of blocking transmission, data transmission can be blocked by transmitting a holding signal to the communication unit in each case of an abnormal supply of basic power and an abnormal operation of the control unit. At this time, in the transmission blocking step, the watchdog unit may reboot the control unit by transmitting a reset signal to the control unit when it determines that the operation of the control unit is abnormal (abnormal operation).
In one example, the self-monitoring method is provided to at least one or more sensors for detecting states of an operating system, an operating device or an operating member in a control unit, or a supply power provided to an operating system, an operating device or an operating member to be monitored. A second monitoring step of monitoring the digital conversion error of the analog signal among the status and monitoring signals is further included, and in the transmission blocking step, if the monitoring result in the second monitoring step indicates that there is a problem with the power supply or a digital conversion error is determined, control is performed. It is possible to block data transmission by transmitting a holding signal from the unit to the communication unit.
For example, in the transmission blocking step, data transmission blocking by transmission of a holding signal to the communication unit is performed by a watchdog unit in each case of an abnormal supply of the basic power supplied to the control unit and an abnormal operation of the control unit, and at least one of the above When an abnormal sensor or the supply power provided to the monitoring target has a problem or the digital conversion error is determined, the control unit may perform each operation.

At this time, in another example, in the self-monitoring method, if the basic power supplied to the control unit after the transmission cutoff step returns within the set supply range within the set supply time or the control unit operates normally, the watchdog unit After the data transmission of the communication unit is blocked by the control unit, when the problem of the supply power or the digital conversion error that caused the blocking is resolved, the control unit resets the communication unit to release the data transmission blocking state. An unblocking step may be further included.

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At this time, in one example, the self-monitoring method converts the analog signal transmitted for monitoring into a digital signal in an analog-to-digital conversion unit, transmits the digital signal to the control unit, and converts the analog-to-digital converter in the analog-to-digital converter separately built into the control unit. A digital conversion step of separately receiving and digitally converting an analog signal that has not gone through the digital conversion step through the unit to generate a comparison digital signal, and in the second monitoring step, the digital conversion signal received from the analog-to-digital conversion unit and If there is an error greater than the set range by comparing the comparison digital signals with each other, it can be determined as a digital conversion error.

In addition, in one example, the self-monitoring method may further include an abnormality display step of displaying an abnormality signal or transmitting an abnormality signal to a set manager terminal when the server unit cannot communicate with the communication unit for a set time or longer.

In another example, the self-monitoring method may be applied for condition-based maintenance of operating systems, operating devices or operating members in transportation equipment, power generation facilities, or production facilities.

At this time, in one example, the transportation device is a railroad car, and the self-monitoring method may be applied for condition-based maintenance for at least one or more of a vehicle wheel set, a vehicle driving motor, and a vehicle air conditioning device.

According to one embodiment of the present invention, it is possible to configure self-diagnosis monitoring in a monitoring system that obtains, processes, and transmits signals from various operating systems so that errors do not occur as much as possible. For example, when an abnormality occurs in a control device that processes signals and controls transmission in an operating system due to the influence of the surrounding environment, the problem can be solved by self-diagnosis.

Even effects that are not directly mentioned in the specification of the present invention, various characteristic effects within the scope of understanding of those skilled in the art from the features of the configuration or various configurations included in various embodiments and modifications of the present invention It is self-evident that it can be derived.

1 is a block diagram schematically illustrating a self-monitoring system according to an embodiment of the present invention.
2 is a schematic block diagram of a self-monitoring system according to another embodiment of the present invention.
3 is a schematic block diagram of a self-monitoring system according to another embodiment of the present invention.
4 is a schematic block diagram of a self-monitoring system according to another embodiment of the present invention.
6 is a schematic block diagram of a self-monitoring system according to another embodiment of the present invention.
7 is a conceptual block diagram schematically illustrating a self-monitoring system according to another embodiment of the present invention.
8 is a schematic flowchart illustrating a self-monitoring method according to an embodiment of the present invention.
9 is a schematic flowchart illustrating a self-monitoring method according to another embodiment of the present invention.
10 is a schematic flowchart illustrating a self-monitoring method according to another embodiment of the present invention.
11 is a schematic flowchart illustrating a self-monitoring method according to another embodiment of the present invention.
12 is a schematic flowchart illustrating a self-monitoring method according to another embodiment of the present invention.
13 is a schematic flowchart illustrating a self-monitoring method according to another embodiment of the present invention.

Embodiments of the present invention for achieving the above object will be described with reference to the accompanying drawings. In the present description, the same reference numerals denote the same components, and sub-descriptions may be omitted in order to promote understanding of the present invention to those skilled in the art.

In the present specification, when one component forms a coupling relationship such as connection or coupling in relation to another component, or a transmission relationship such as transmission or transfer, unless there is a limitation of 'direct', a 'direct' coupling relationship. In addition to forms such as transfer relationships, they may also exist in the form of a coupling relationship by an intermediary or a transmission relationship via which another component is related therebetween.

In addition, it should be noted that even if a configuration is expressed in the singular in this specification, it may be used as a concept representing the entirety of a plurality of configurations unless interpreted contradictory or contrary to the concept of the invention.

In addition, in this specification, the description of words such as 'comprise', 'comprising' and terms derived from them indicate the possibility of addition, combination or combination of one or more other elements to original elements or elements. addition, combination or combination of one or more other elements to original elements or elements, and furthermore, descriptions of words having meanings such as 'to have' and 'to be composed of' and terms derived therefrom If the original elements or elements do not lose their characteristics, functions and / or properties by the addition of one or more other elements or combinations of such elements should not be excluded.

[Self-monitoring system]

First, a self-monitoring system according to one aspect of the present invention will be described with reference to the drawings. Embodiments of a self-monitoring system described below may be equally applied to a self-monitoring method described below.

1 is a block configuration diagram schematically showing a self-monitoring system according to one embodiment of the present invention, and FIG. 2 is a block configuration diagram schematically showing a self-monitoring system according to another embodiment of the present invention. 3 is a block diagram schematically showing a self-monitoring system according to another embodiment of the present invention, FIG. 4 is a block diagram schematically showing a self-monitoring system according to another embodiment of the present invention, and FIG. 6 is It is a block diagram schematically showing a self-monitoring system according to another embodiment of the present invention, and FIG. 7 is a conceptual block diagram schematically showing a self-monitoring system according to another embodiment of the present invention.

The present invention provides a technique for preventing errors from occurring as much as possible by configuring self-diagnosis monitoring in a monitoring system that acquires, processes, and transmits signals from various operating systems.

1 to 7, the self-monitoring system 1, 1a, 1b, 1c according to one example includes a control unit 10, a power unit 40, a communication unit 30, and a watch dog It consists of a unit (20). At this time, the control unit 10 receives and processes the monitoring signal for monitoring the operating system, the operating device or the operating member. The power unit 40 supplies basic power to the control unit 10 . The communication unit 30 transmits at least some or all of the monitoring signals processed by the control unit 10 to the server unit 60 . In addition, the watchdog unit 20 monitors the supply of basic power and the operation of the control unit 10, and blocks data transmission to the server unit 60 through the communication unit 30 when an abnormality is detected.

For example, the self-monitoring systems 1, 1a, 1b, and 1c may be for condition-based maintenance of various systems. For example, the self-monitoring systems 1, 1a, 1b, and 1c may be applied to condition diagnosis and prediction systems of various systems. For example, the self-monitoring systems 1, 1a, 1b, and 1c may be applied for condition-based maintenance of operating systems, operating devices or operating members in transportation equipment, power generation facilities, or production facilities. In this specification, the embodiment will be described with reference to FIGS. 3 to 7, focusing on the case of a railroad car, but it should be noted that it is not limited thereto.

Also, referring to FIGS. 2 to 6 , the self-monitoring systems 1, 1a, 1b, and 1c according to one example may further include an analog-to-digital converter (ADC) unit 50.

Hereinafter, each configuration will be described in detail with reference to FIGS. 1 to 7 .

control unit (10)

Examine the control unit 10 with reference to FIGS. 1 to 7 . The control unit 10 receives and processes monitoring signals for monitoring the operating system, the operating device or the operating member. In the present invention, an operating system, an operating device or an operating member refers to a system including a device or member that moves or operates by receiving power or action, and such a device or member. For example, an operation member may mean a member that performs, for example, one detailed operation forming a part of an integrated or interlocked operation in a system or device that performs an integrated or interlocked operation, but is not limited thereto, and is not limited thereto. It can also be seen as a device that performs the operation of For example, examples of the operating system include, for example, a power transmission system including a wheel, an axle box and/or a gear box in a transport device, a propulsion system including a propulsion motor and/or an inverter, an air conditioning system such as HVAC, an automatic door, etc. A customer convenience system, etc. may be cited, but is not limited thereto. For example, an air conditioning system and a customer convenience system may be grouped together and classified as a convenience system. For example, examples of the operating device or operating member include, but are not limited to, wheels, axles, gears, motors, inverters, HVAC, blowers, automatic doors, etc. in transportation devices.

In the present invention, the monitoring signal refers to a signal that detects or detects the operation or state of an operating system, an operating device or an operating member. For example, the monitoring signal may be a sensing signal from the sensors 70 and 70a to 70f. For example, the monitoring signal may be its own detection signal or generated signal related to the operating state of the operating system, operating device or operating member. For example, the monitoring signal may be a detection signal or a sensed signal related to an operating state of a power transmission system, a propulsion system, an air conditioning system, or/and a convenience system or device in a transportation device, a power generation device, or a production facility.

The monitoring signal received by the control unit 10 may be a digital signal, or when the control unit 10 receives an analog signal as the monitoring signal, digital conversion processing may be performed. For example, processing of the monitoring signal in the control unit 10 may be pre-processing of a signal for transmission to the server unit 60 through the communication unit 30 or transmission processing itself to the communication unit 30 .

For example, referring to FIG. 7 , in case of state-based maintenance of a vehicle wheel set belonging to a power transmission system in the case of a railway vehicle, vehicle wheels, wheel bearings, and the like may be examples of operating devices or operating members. Further, in the case of a vehicle driving motor system belonging to a propulsion system, examples of an actuating device or an actuating member may include a motor, a fan, and the like, and a device for measuring the RPM of the motor may also be included. In addition, in the case of a vehicle air conditioning system belonging to a convenience system, examples of operating devices or operating members may include a compressor, an evaporator, a blower, and the like. In the case of a customer convenience system belonging to the convenience system, there may be an automatic door. 7 is illustrative and not limited thereto.

Referring to FIGS. 3 to 6 , the control unit 10 may consist of the MCU 11 or include the MCU 11 . For example, the control unit 10 may further include a memory 13 in addition to the MCU 11 . At this time, the memory 13 may be a buffer memory that is a temporary storage space for signal processing in the MCU 11 or/and a storage memory for data storage. The memory 13 shown in FIGS. 3 to 6 may constitute a separate memory unit other than the control unit 10 .

For example, in one example, the control unit 10 is provided with at least one or more sensors 70, 70a to 70f for detecting the state of the operating system, the operating device or the operating member, or the operating system, operating device or operation subject to monitoring. It is possible to monitor the state of power supply from the power unit 40 provided to the member, or a digital conversion error of an analog signal among monitoring signals received from the control unit 10. 3 to 6, the control unit 10 transmits a voltage and/or current monitoring signal (value) to the sensor 70 or the state of the supply power provided to the monitoring target of the power unit (power unit) 40. It can be received and monitored from the power monitoring circuit of the operating power regulator block 43, more specifically, for example, the operating power regulator block 43. Monitoring of digital conversion errors of analog signals in the control unit 10 will be described in detail later. The analog signal may be a signal detected by at least one or more sensors 70 and 70a to 70f or a signal generated by an operating system, an operating device, or an operating member to be monitored. At this time, the control unit 10 may block data transmission by transmitting a holding signal to the communication unit 30 when it is determined that there is an abnormality in the supply power or a digital conversion error as a result of monitoring. Blocking data transmission of the communication unit 30 by the control unit 10 is performed in case of a power failure or digital conversion error, while blocking data transmission of the communication unit 30 by the watchdog unit 20 described later is controlled There is a difference in that it is made in the case of an abnormality of the basic power supplied to the unit 10 or an abnormal operation of the control unit 10.

For example, when the control unit 10 to MCU 11 operates normally, for example, errors that may occur in a module that converts analog signals detected from sensors 70 and 70a to 70f into digital data and sensors 70 and 70a ~ 70f), etc., the control unit 10 to MCU 11 directly monitors errors in the power state used by peripheral devices. In this specification, the peripheral device includes the sensors 70 and 70a to 70f, an operating system to be monitored, and an operating device or operating member. At this time, the control unit 10 to MCU 11 monitors the state of power used for peripheral devices such as sensors 70 and 70a to 70f and sends a holding signal to the communication unit 30 when there is an abnormality.

For example, referring to FIG. 4 , the control unit 10 may include a separate analog-to-digital converter (ADC) 11a. 2 to 6 separately from the analog-to-digital converter (ADC) 11a built in the control unit 10, the self-monitoring systems 1, 1a, 1b, and 1c are analog-to-digital converters (ADC) units 50 ) can be provided. The analog-to-digital conversion (ADC) unit 50 digitally converts the analog signal transmitted for monitoring and transmits it to the control unit 10 . An analog signal for monitoring received by the analog-to-digital converter (ADC) unit 50 is a signal detected by the sensors 70 and 70a to 70f or generated by an operating system, an operating device or an operating member to be monitored. At this time, the analog signal that is not digitally converted in the analog-to-digital converter (ADC) unit 50 is separately received by the analog-to-digital converter (ADC) 11a of the control unit 10 and digitally converted to generate a comparison digital signal. can 3 to 6, the various sensor signal comparison signals are signals that are not digitally converted in each ADC block 51 of the ADC unit 50. Each sensor signal comparison signal, which is a signal that is not digitally converted in each ADC 51, is transmitted to the control unit 10, for example, the MCU 11, and referring to FIG. 4, in the ADC 11a of the MCU 11 It can be received and digitally converted to digital conversion in each ADC block 51 and compared with each sensor signal received.

The control unit 10 mutually compares the digital conversion signal received from the analog-to-digital converter (ADC) unit 50 and the comparison digital signal converted by the analog-to-digital converter (ADC) 11a to determine if there is an error greater than the set range. In this case, it can be judged as a digital conversion error. For example, referring to FIG. 4, each sensor signal that is a digital conversion signal received from each ADC block 51 of the ADC unit 50 and each sensor signal comparison signal received without digital conversion from each ADC block 51 When the comparison digital signals digitally converted in the ADC 11a of the control unit 10 are compared with each other and have an error greater than a set range, the control unit 10, for example, the MCU 11, may determine a digital conversion error.

An analog-to-digital converter (ADC) unit 50 that digitizes an analog signal normally used in a condition-based maintenance (CBM) system uses high-resolution, high-precision components. At this time, a separate ADC module (11a) is also built inside the MCU (11), and the signal that has passed only the low-pass filter in the measured analog signal is simultaneously digitally converted and the digital data is mutually compared to show an error greater than the dynamic range MCU (11) may transmit a holding signal for blocking data transmission to the Ethernet communication module 30. Here, the impedance of the ADC module 11a built into the MCU 11 is very high so that the coupling problem of the analog signal does not occur.

For example, after the data transmission of the communication unit 30 by the control unit 10 is blocked, when the problem of the supply power abnormality or digital conversion error that caused the blocking is resolved, the control unit 10 transmits the communication unit 30 By resetting the holding state of , the data transmission blocking state can be released. For example, the control unit 10 is a communication unit when there is no problem with the state of the digital data processed by the ADC unit 50 within a set period of time and there is no problem with the power supplied to peripheral devices such as the sensors 70 and 70a to 70f. The holding state of (30) can be released.

For example, referring to FIG. 4, the control unit 10, for example the MCU 11, receives sensor data from the ADC unit 50 through SPI communication, and transmits Ethernet communication data to the communication unit 30 through UART communication. can transmit and receive. For example, in FIG. 4, the control unit 10, for example, the ADC module 11a of the MCU 11 receives the non-digitized sensor signal comparison signal from each ADC block 51 of the ADC unit 50 and converts it to a digital signal. can be converted

Referring to FIGS. 3 to 6 , the control unit 10 may form a control block (control block) together with the watchdog unit 20, but is not limited thereto. For example, referring to FIGS. 3 to 6 , the control block (control block) may further include a temperature monitoring block, but is not limited thereto. The temperature monitoring block may perform monitoring and transmit the temperature monitoring value to the control unit 10, that is, the MCU 11. For example, referring to FIG. 6, the control block (control block) may further include an internal power block to supply power to the control unit 10 or the like within the control block. At this time, even when the control block (control block) includes an internal power block, power may be separately supplied from the power unit (power unit) 40 to the watchdog unit 20 .

power unit (40)

The power unit 40 will be looked at with reference to FIGS. 1 to 7 . The power unit 40 supplies basic power to the control unit 10 . At this time, the state of basic power supplied from the watchdog unit 20 to the control unit 10 is monitored. For example, referring to FIGS. 3, 4, 5 and/or 6, the power unit 40 is a transportation device such as a railway vehicle to which the self-monitoring system 1a, 1b, 1c is applied, a power generation facility such as a wind power generator, and production It may be a power conversion device that converts power supplied from power sources such as facilities for supply to each component of the self-monitoring system 1a, 1b and 1c and to the monitoring target. For example, referring to FIGS. 3 to 6, the watchdog unit 20 receives power from the operating power regulator block 43 of the power unit 40, for example, the power monitoring circuit of the operating power regulator block 43 in detail. It monitors the state of the basic power, that is, the voltage monitoring signal. For example, referring to FIG. 4 , the power monitoring circuit may include a voltage & current monitoring circuit and an LDO, but is not limited thereto. For example, referring to FIG. 4, in the voltage & current monitoring circuit of the power monitoring circuit, a monitoring signal for the supply power supplied to at least one or more sensors 70, 70a to 70f or/and at least one system peripheral device, that is, voltage <RTI ID=0.0> The current monitoring signal is provided to the control unit 10, that is, the MCU 11, and the monitoring signal for the voltage supplied from, for example, the LDO of the power monitoring circuit to the control unit 10, for example, the MCU 11, that is, the voltage monitoring signal may be provided to the watchdog unit 20, but is not limited thereto. At this time, the voltage monitoring signal monitored by the watchdog unit 20 is a separate signal from the voltage & current monitoring signal (value) monitored by the control unit 10, that is, the MCU 11, which will be described later. That is, the voltage monitoring signal monitored by the watchdog unit 20 is a monitoring signal for the basic power supplied to the control unit 10, and the voltage & current monitored by the control unit 10, that is, the MCU 11 The signal (value) is a monitoring signal for supply power provided to the sensor 70 or system peripherals. For example, referring to FIGS. 3 to 6, both the voltage monitoring signal monitored by the watchdog unit 20 and the voltage & current monitoring signal (value) monitored by the control unit 10, i.e., the MCU 11, are connected to the power unit ( 40) may be provided to the watchdog unit 20 and the control unit 10, that is, the MCU 11, in the operating power regulator block 43, for example, the power monitoring circuit.

For example, the power unit 40 may supply a separate power separate from the control unit 10 to the watchdog unit 20 . In the present invention, the basic power refers to power supplied from the power unit 40 to the control unit 10, and the separate power refers to separate power provided to the watchdog unit 20. For example, the power (power) unit 40 includes an operating power regulator block 43 to supply basic power supplied to the control unit 10 and separate power supplied to the watchdog unit 20 .

For example, the power unit 40 may supply power to an operating system, at least one or more sensors 70 and 70a to 70f for detecting states of an operating device or an operating member, and/or at least one or more system peripheral devices. At this time, the control unit 10 may monitor the state of the supply power supplied to at least one or more sensors 70 and 70a to 70f and/or at least one system peripheral device. The system peripheral device may include an operating system to be monitored, an operating device or an operating member, or sensors 70 and 70a to 70f. For example, referring to FIGS. 3 to 6, the state of the supply power supplied to the sensor 70 or system peripherals, that is, the voltage & current monitoring signal (value) is the operating power regulator block 43 of the power supply (power) unit 40. ), for example, can be specifically transmitted to and monitored by the control unit 10, for example the MCU 11, through the power monitoring circuit of the operating power regulator block 43.

3 to 6, the power (power) unit 40 may include a circuit protection block 41 and an operating power regulator block 43, but is not limited thereto. For example, referring to FIGS. 3 and/or 5, the circuit protection block 41 includes an overvoltage & overcurrent protection circuit to protect against surge voltage or overcurrent. In addition, referring to FIG. 6 , the circuit protection block 41 is provided with a DC/DC converter + isolation circuit to appropriately convert a power signal that has passed through a surge voltage or overcurrent protection circuit. The operating power regulator block 43 may include a DC/DC converter circuit and a power monitoring circuit. The operating power regulator block 43 may supply appropriate voltage and/or current to the control unit 10 and each unit or device of the system through DC/DC conversion. In particular, the operating power regulator block 43 may supply a basic power supplied to the control unit 10 and a separate power to the watchdog unit 20 . For example, the power monitoring circuit of the operating power regulator block 43 transmits the state of the basic power supplied to the control unit 10 as a voltage monitoring signal to the watchdog unit 20, and the sensor 70 or other system units It is possible to transmit the state of supply power supplied to the devices to the control unit 10, that is, the MCU 11, as a voltage & current monitoring signal (value).

communication unit (30)

The communication unit 30 will be described with reference to FIGS. 1 to 7 . The communication unit 30 transmits at least some or all of the monitoring signals processed by the control unit 10 to the server unit 60 . For example, in FIGS. 3, 5 and/or 7, the communication unit 30 uses the balance sensor module (sBSM), which is the hub 65 in an example of a wheel sensor module (sWSM) or propulsion sensor module (sTSM) system of a railway vehicle. Through this, signal data can be transmitted to the edge server, which is the server unit 60, and in the case of the air conditioning monitoring system (sCMS) of the railway vehicle in FIG. 6 and / or 7, the communication unit 30 is the hub 65, the balance sensor module ( Signal data can be transmitted to the server unit 60 without going through the sBSM). For example, the balance sensor module (sBSM), which is a kind of hub 65 in FIGS. 3, 5 and/or 7, may be a hub and a server at the same time, depending on the embodiment.

For example, although not shown, the communication unit 30 may perform wired or/and wireless based communication. For example, wireless-based communication may be short-distance wireless communication such as wireless LAN, Wi-Fi, and Bluetooth, but is not limited thereto. For example, the communication unit 30 may be, for example, a local area network (LAN), that is, an Ethernet communication unit. For example, an Ethernet communication unit may include an Ethernet transceiver and a LAN transformer, but is not limited thereto. For example, the LAN transformer may communicate with the server unit 60 and the Ethernet transceiver may receive a holding signal transmitted from the watchdog unit 20 or a holding signal transmitted from the control unit 10 .

Watchdog unit (20)

The watchdog unit 20 will be described with reference to FIGS. 1 to 7 . The watchdog unit 20 monitors the supply of basic power and the operation of the control unit 10 and blocks data transmission to the server unit 60 through the communication unit 30 when an abnormality is detected. The watchdog unit 20 self-monitors errors caused by the control unit 10 to secure the reliability of the condition-based maintenance (CBM) technology, thereby fundamentally blocking inaccuracies in diagnosis and/or prediction based on false signals. do.

For example, the self-monitoring system of the present invention can be applied to systems such as transportation devices, power generation facilities, production facilities, etc., but will be mainly examined in the case of railroad vehicles as shown in FIGS. 3 to 7 . In order to diagnose and predict the state of major systems or parts of railway vehicles and to secure the reliability of condition-based maintenance (CBM) technology, it is necessary to prevent errors from occurring in the processing of measured sensor signals or the communication process of processed signals. there is Accordingly, it is necessary to fundamentally block inaccuracies in diagnosis and prediction based on erroneous signals by self-monitoring sensor signal processing or communication errors. For example, the cause of the most serious abnormality in the process of digitally converting an analog sensor signal detected from a railroad car and communicating is a problem with the basic power of the main processing unit (MCU) 11 of the system due to environmental factors. There are cases in which this occurs and the MCU 11 does not operate properly. Therefore, it is necessary to monitor the basic power supply state of the control unit 10 and the operating state of the control unit 10 . To monitor such a state, a watchdog unit 20 having a logic circuit is configured.

Referring to FIGS. 1 to 6 , in one example, the watchdog unit 20 receives separate power from the power unit 40 to operate. For example, the watchdog unit 20 uses a separate power supply separate from the basic power supply of the MCU 11 and is configured with a circuit that is not significantly affected by power fluctuations, so that even when the MCU 11 has a power failure, the watchdog unit 20 ) to work well. For example, as shown in FIG. 6, even when the watchdog unit 20 constitutes a control block (control block) together with the control unit 10 and has an internal power block in the control block (control block), The internal power block supplies power to the control unit 10, but the watchdog unit 20 operates by receiving separate power from the power unit (power unit) 40 instead of the internal power block within the control block.

At this time, the watchdog unit 20 monitors the basic power supplied to the control unit 10 to determine whether it is out of the set supply range, and determines whether the control unit 10 is in a normal operating state. For example, a monitoring signal for basic power supplied to the control unit 10 may be received from the operating power regulator block 43 of the power unit (power unit) 40 . For example, since power is supplied to the control unit 10 from the operating power regulator block 43 of the power unit (power unit) 40, check whether power is well supplied from the operating power regulator block 43 to the control unit 10. can be monitored. The watchdog unit 20 may block data transmission by transmitting a holding signal to the communication unit 30 in each case where the basic power is out of the set supply range or it is determined that the control unit 10 is operating abnormally. For example, the holding signal may be a communication cutoff signal for blocking communication as shown in FIGS. 3 to 6 . The watchdog unit 20 always monitors the voltage and current of the basic power supply of the control unit 10 to MCU 11, and if it exceeds a certain range, it first provides a holding signal to the Ethernet communication module 30 so that an error occurs. Prevent transmission of data that may have been generated.

For example, referring to FIG. 2 , in one example, the watchdog unit 20 may include a separate counter 21 . At this time, the counter 21 periodically receives a trigger signal from the control unit 10 . 3 to 6, the trigger signal received from the control unit 10 is an MCU pulse monitoring signal. The watchdog unit 20 may determine that the control unit 10 is operating abnormally when the counter 21 does not receive a trigger signal within a set time range. For example, a separate counter 21 is installed in the watchdog unit 20 and a circuit is configured to periodically receive a 0 Set trigger signal from the MCU 11, and the counter 21 does not receive a trigger signal within a certain range. In this case, it is determined that the MCU 11 does not operate normally, and even in this case, a holding signal, for example, a communication cutoff signal is transmitted to the communication unit 30 to prevent transmission of data that may have occurred in error. .

In addition, in one example, the watchdog unit 20 may reboot the control unit 10 by transmitting a reset signal to the control unit 10 upon determining an abnormal operation. For example, referring to FIGS. 3 to 6 , an MCU reset signal may be transmitted from the watchdog unit 20 to the control unit 10 to reboot the control unit 10, for example, the MCU 11.

In addition, the watchdog unit 20 resets the communication unit 30 when the basic power is out of the set supply range and returns to the set supply range within the set supply time or when the control unit 10 operates normally after an abnormal operation, The transmission blocking state can be released. For example, the watchdog unit 20 generates an MCU reset signal from the watchdog unit 20 when the power state of the MCU 11 returns to normal within a predetermined time or when the MCU 11 fails to operate normally. 11) is rebooted, and if the MCU operates normally thereafter, the holding state can be released by resetting the held communication unit 30.

For example, referring to FIGS. 3 to 6 , the watchdog unit 20 and the control unit 10 may form a control block (control block). At this time, the watchdog unit 20 blocks data transmission to the server unit 60 by controlling the communication unit 30 according to the power state or normal operation of the control unit 10, and the control unit 10 Data transmission to the server unit 60 may be blocked by controlling the communication unit 30 according to the power state of peripheral devices such as the sensors 70 and 70a to 70f or whether there is a digital conversion error in the monitoring signal.

Analog-to-digital conversion unit (50)

Referring to FIGS. 2 to 6 , the self-monitoring systems 1, 1a, 1b, and 1c may further include an analog-to-digital converter (ADC) unit 50. At this time, the analog-to-digital conversion unit 50 digitally converts the analog signal transmitted for monitoring and transmits it to the control unit 10 . The analog signal is a signal detected by the sensors 70 and 70a to 70f or generated by an operating system, an operating device or an operating member to be monitored.

For example, referring to FIGS. 3 to 6, an analog-to-digital conversion (ADC) unit 50 includes an ADC block 51. For example, referring to FIGS. 3 and 4 , the ADC unit 50 may include an ADC circuit 51 and an SPI interface 53, but is not limited thereto. For example, a plurality of ADC blocks 51 may be provided according to the number of sensors 70 and 70a to 70f. For example, referring to FIGS. 3 and 4, in the case of a wheel set monitoring system (WSM), when sensing signals are received from the vibration sensor 70a and the temperature sensor 70b, the ADC block 51 converts the analog vibration signal to a digital one. A vibration signal ADC block for conversion and a temperature signal ADC block for processing the temperature signal may be provided. For example, referring to FIG. 5 , in the case of a railroad car TSM system, the ADC unit 50 receives sensing signals from a temperature sensor 70b, a current sensor 70c, a vibration sensor 70a, and a speed sensor 70d, and The ADC block 51 may include a temperature signal ADC block, a current signal ADC block, a vibration signal ADC block, and a speed signal ADC block. For example, referring to FIG. 6, in the case of a railway vehicle convenience system (CMS), the ADC unit 50 includes a current sensor 70c, a vibration sensor 70a, a temperature sensor 70b, a pressure sensor 70e, and a position sensor. The sensing signal is received from 70f, and the ADC block 51 may include a current signal ADC block, a vibration signal ADC block, a temperature signal ADC block, a pressure signal ADC block, and a position signal ADC block.

For example, the ADC circuit or the ADC block 51 includes a low-pass filter (LPF) processing analog signals received from the sensors 70 and 70a-70f, a linear phase filter (LPDF) processing signals processed by the LPF, An AD converter that converts the signal processed by the LPDF into a digital signal and an OP-AMP that amplifies the signal branched and output from the LPF may be provided.

For example, referring to FIG. 6 , the ADC unit 50 may further include an ADC control block in addition to the ADC circuit or the ADC block 51 . The ADC control block may perform processing for transmitting the sensor signals of each sensor processed in the ADC circuit or the ADC block 51 to the control unit 10 . At this time, the ADC control block is a MUX interface circuit that MUXs and outputs the sensing signal from each sensor digitally converted in each ADC block 51 and the analog from each sensor that is not digitally converted in each ADC block 51. It may include an SPI interface circuit that outputs a signal. At this time, the sensor signal or sensor data output through the MUX interface circuit is transmitted to and processed by the control unit 10, and the sensor signal comparison signal output through the SPI interface circuit is output in the ADC module 11a of the control unit 10. It can be digitally converted and compared with the sensor signal (Data) received from the MUX interface circuit.

Server unit (60)

Next, look at the server unit 60 with reference to FIGS. 6 and 7 . In one example, the server unit 60 may display an abnormal signal or transmit an abnormal signal to a set manager terminal when communication with the communication unit 30 is not established for a set time or longer. For example, communication between the server unit 60 and the communication unit 30 is interrupted because the communication state is blocked in the communication unit 30 by the holding signal of the watchdog unit 20 and/or the holding signal of the control unit 10. It happens. Yes, even in the case of FIGS. 3 and/or 5, the communication unit 30 may be connected to the server 60 through a balance sensor module (sBSM) that is a kind of hub 65. For example, the balance sensor module (sBSM) constitutes a hub (hub) 65, and although not shown, according to an embodiment, it may be a hub 65 and a server 60 at the same time, but is not limited thereto.

When the server unit 60 continues to lose communication with the communication unit 30, it determines that it is in a state in which self-recovery is impossible and displays an abnormal signal. For example, an alarm is sent to an administrator. The manager terminal may be a PC terminal, a tablet terminal, a PDA terminal, a smart phone terminal, etc. connected to the server unit 60 in communication, but is not limited thereto.

For example, referring to FIG. 7, the server unit 60 may be a local network server, but is not limited thereto. In FIG. 7, the edge server 60 is shown as a local network server, but although not shown, the hub 65 shown in FIGS. 3, 5 and/or 7 may operate as a local network server. In FIG. 7 , data may be transmitted to the outside through wireless communication via the local network server 60 .

system application

In one example, the self-monitoring system (1, 1a, 1b, 1c) may be applied for condition-based maintenance of an operating system, operating device or operating member in a transportation device, power generation facility, or production facility, but is not limited thereto. . For example, the self-monitoring systems 1, 1a, 1b, and 1c may be applied to condition diagnosis and prediction systems of various systems. In this specification, FIGS. 3 to 7 show an embodiment centered on a railroad vehicle, but may be applied to other transportation devices other than a railroad vehicle, such as vehicles, ships, aircraft, etc., and may also be applied to power generation facilities such as wind power generation. And, it can be applied to production facilities using motors, etc., but is not limited thereto.

For example, referring to FIGS. 3 to 7 , a transport device to which the self-monitoring systems 1, 1a, 1b, and 1c are applied may be a railroad car. At this time, referring to FIGS. 3 to 7, the self-monitoring systems 1, 1a, 1b, and 1c include a module for a condition-based maintenance system of a power transmission system, a module for a condition-based maintenance system of a propulsion system, and a condition-based maintenance system of an air conditioning system. It can be applied to a module for a maintenance system, a module for a condition-based maintenance system of a customer convenience system, and the like. For example, it may be applied to an integrated system including at least two or more of these modules. For example, as shown in FIGS. 3, 5 or 6, a wheel sensor module (sWSM) as an example of a module for a state-based maintenance system of a power transmission system and a propulsion sensor as an example of a module for a state-based maintenance system of a propulsion system. As an example of the module (sTSM) and a module for the condition-based maintenance system of the convenience system, the self-monitoring systems (1a, 1b, and 1c) may be applied to each of the air conditioning monitoring system (sCMS), or as shown in FIG. A self-monitoring system, for example, iCBM, can be applied to an integrated system for centralized CBM including a wheel sensor module (sWSM), a propulsion sensor module (sTSM), and an air conditioning monitoring system (sCMS).

For example, FIG. 3 shows a state in which the self-monitoring system 1a is applied to a wheel sensor module (sWSM), which is a module for a condition-based maintenance system of a vehicle wheel set belonging to a power transmission system in a railway vehicle. At this time, the wheel sensor module (sWSM) represents a monitoring system for wheel set condition-based maintenance (CBM). 5 shows, for example, that the self-monitoring system 1b is applied to the propulsion sensor module (sTSM), which is a module for the state-based maintenance system of the vehicle drive motor belonging to the propulsion system in the railway vehicle, and at this time, the propulsion sensor module ( sTSM) represents a monitoring system for CBM of a railway vehicle drive motor system. 6 is a self-monitoring system (1c) applied to an air conditioning monitoring system (sCMS), which is a module for a condition-based maintenance system of a convenience system such as an air conditioning system such as a vehicle air conditioning device or a customer convenience system such as an automatic door in a railroad car, for example. The figure is shown, and the air conditioning monitoring system (sCMS) represents a monitoring system for CBM of a railway vehicle convenience system.

In addition, FIG. 7 shows that the self-monitoring system is applied to an integrated measurement system including, for example, a wheel sensor module (sWSM), a propulsion sensor module (sTSM), and an air conditioning monitoring system (sCMS) in a railway vehicle. In FIG. 7, each of the wheel sensor module (sWSM), propulsion sensor module (sTSM), and air conditioning monitoring system (sCMS) modules may be self-monitoring systems 1a, 1b, and 1c, and at this time, the hub module 65 is the balance sensor module. (sBSM) may operate as a hub 65 as shown in FIG. 7 or may serve as a server unit 60 in some cases. In addition, the self-monitoring system can be applied to the iCBM, which is an integrated measurement system module in FIG. It may be a self-monitoring system (1a, 1b, 1c) module according to one embodiment. In FIG. 7 , when the integrated measurement system module iCBM is a self-monitoring system module according to an embodiment of the present invention, the edge server may serve as the server unit 60 .

[Self-monitoring method]

Next, a self-monitoring method according to another aspect of the present invention will be described with reference to the drawings. In this case, the above-described embodiments of the self-monitoring system and FIGS. 1 to 7 may be equally applied to an embodiment of a self-monitoring method described later, and duplicate descriptions may be omitted. Accordingly, detailed descriptions of operations or operations in each step in the embodiment of the self-monitoring method may be understood with reference to the operations or descriptions of operations in the above-described embodiment of the self-monitoring system.

8 is a schematic flowchart showing a self-monitoring method according to one embodiment of the present invention, FIG. 9 is a schematic flowchart showing a self-monitoring method according to another embodiment of the present invention, and FIG. 10 is a schematic flowchart of the present invention. 11 is a schematic flowchart showing a self-monitoring method according to another embodiment of the present invention, and FIG. 12 is a schematic flowchart showing a self-monitoring method according to another embodiment of the present invention. It is a schematic flowchart showing a self-monitoring method according to an embodiment, and FIG. 13 is a schematic flowchart showing a self-monitoring method according to another embodiment of the present invention.

8 to 13, the self-monitoring method according to one example includes a first monitoring step (S100), a data transmission step (S300), and a transmission blocking step (S500). At this time, in the first monitoring step (S100), the basic power state supplied to the control unit 10 that receives and processes the monitoring signal for monitoring the operating system, the operating device or the operating member and the operating state of the control unit 10 It is monitored by a watch dog unit 20 operating with a separate power source. In the data transmission step (S300), the communication unit 30 transmits at least some or all of the monitoring signals processed by the control unit 10 to the server unit 60. In the transmission blocking step (S500), when the watchdog unit 20 detects an abnormality in the supply of basic power and the operation of the control unit 10 in the first monitoring step (S100), the server through the communication unit 30 Block data transmission to unit 60.

In addition, referring to FIG. 10 , the self-monitoring method according to an example may further include a blocking releasing step (S700). Referring to FIG. 11 , the self-monitoring method according to another example may further include a second monitoring step ( S200 ). In addition, referring to FIG. 12 , the self-monitoring method according to another example may further include a digital converting step (S50). Furthermore, referring to FIG. 13 , the self-monitoring method according to another example may further include an abnormality display step (S600).

For example, in one example, the self-monitoring method may be applied for condition-based maintenance of operating systems, operating devices or operating members in transportation equipment, power generation facilities, or production facilities.

For example, the transport device is a railroad vehicle, and the self-monitoring method according to one example is a vehicle power transmission system such as a vehicle wheel set, a vehicle propulsion system such as a vehicle driving motor, and at least one or more convenience systems such as vehicle air conditioning equipment and automatic doors. It can be applied for condition-based maintenance for

Hereinafter, each step will be described in detail with reference to FIGS. 8 to 13 .

First monitoring step (S100)

8 to 13, in the first monitoring step (S100), the basic power state and control unit ( The operating state of 10) is monitored by a watch dog unit 20 operated by a separate power source. In the present invention, the monitoring signal refers to a signal that detects or detects the operation or state of an operating system, an operating device or an operating member. For example, the monitoring signal may be a signal detected by the sensors 70 and 70a to 70f or generated by an operating system, an operating device, or an operating member to be monitored. At this time, the monitoring signal received from the control unit 10 may be a digital signal, or when the control unit 10 receives an analog signal as a monitoring signal, digital conversion processing may be performed. At this time, the basic power is power supplied from the power unit 40 to the control unit 10, and the separate power refers to power separately supplied from the power unit 40 to the watchdog unit 20.

For example, referring to FIG. 9, in the first monitoring step (S100), it is determined whether or not the basic power supplied to the control unit 10 is out of the set supply range, and the control unit 10 Operation abnormality of the control unit 10 can be determined by whether or not the trigger signal periodically received from the trigger signal is received within the set time range.

Data transmission step (S300)

8 to 13, in the data transmission step (S300), the communication unit 30 transmits at least some or all of the monitoring signals processed by the control unit 10 to the server unit 60.

Transmission blocking step (S500)

8 to 13, in the transmission blocking step (S500), in the first monitoring step (S100) in the watchdog unit 20, when an abnormality is detected in the supply of basic power and the operation of the control unit 10, communication Data transmission to the server unit 60 through the unit 30 is blocked.

For example, referring to FIG. 9 , in the transmission blocking step (S500), a holding signal is sent from the watchdog unit 20 to the communication unit 30 in each case of a supply failure of the basic power supply and an operation failure of the control unit 10. to block data transmission.

In addition, referring to FIG. 10, in the transmission blocking step (S500b), the watchdog unit 20 transmits a reset signal to the control unit 10 when it determines that the control unit 10 is operating abnormally, thereby rebooting the control unit 10. can make it

For example, referring to FIG. 11, in the transmission blocking step (S500), if the monitoring result in the second monitoring step (S200) indicates that there is an abnormality in the supply power or a digital conversion error, the communication unit 30 in the control unit 10 A holding signal may be transmitted to block data transmission (S500c).

Unblocking step (S700a, S700b)

Referring to FIGS. 10 and 11 , in one example, the self-monitoring method may further include unblocking steps S700a and S700b. Referring to FIG. 10, in the unblocking step (S700a), the basic power whose supply state was abnormal after the transmission blocking step (S500) returns to within the set supply range within the set supply time or the control unit 10, which was operating abnormally, returns to normal. When it is operated, the communication unit 30 can be reset in the watchdog unit 20 to cancel the data transmission blocking state.

For example, referring to FIG. 11, in the blocking release step (S700b), when the supply power returns to normal from an abnormal state within a certain time after the transmission blocking step (S500c) or the digital conversion error in the digital conversion process disappears, the control unit In (10), the communication unit 30 can be reset to cancel the data transfer blocking state. That is, when the control unit 10 determines that there is no problem with the state of the digital data processed by the ADC unit 50 within a certain time and there is no problem with the power supplied to peripheral devices such as the sensors 70 and 70a to 70f. The holding state of the communication unit 30 can be released.

For example, the unblocking step S700a of FIG. 10 and the unblocking step S700b of FIG. 11 may be implemented together in one embodiment.

Second monitoring step (S200)

Referring to FIG. 11 , the self-monitoring method according to an example may further include a second monitoring step ( S200 ). At this time, in the second monitoring step (S200), in the control unit 10, at least one or more sensors (70, 70a ~ 70f) for detecting the state of the operating system, the operating device or operating member, or the monitoring target operating system, It is possible to monitor the state of supply power supplied to the operating device or operating member, or a digital conversion error of an analog signal among monitoring signals. In this case, the analog signal may be a signal detected by at least one or more sensors 70 and 70a to 70f or a signal generated by an operating system, an operating device, or an operating member to be monitored.

For example, referring to FIG. 11, at this time, in the transmission blocking step (S500), when the monitoring result in the second monitoring step (S200) indicates that there is an abnormality in the supply power or a digital conversion error, the control unit 10 communicates with the communication unit. It is possible to block data transmission by transmitting a holding signal to (30).

For example, referring to FIG. 12, in the second monitoring step (S200), the control unit 10 mutually compares the digital conversion signal received from the analog-to-digital converter (ADC) unit 50 with the comparison digital signal to set the range. If there is an error above, it can be judged as a digital conversion error.

Digital conversion step (S50)

Referring to FIG. 12 , the self-monitoring method according to another example may further include a digital converting step (S50). At this time, in the digital conversion step (S50), the analog signal transmitted for monitoring is digitally converted in the analog-to-digital conversion (ADC) unit 50 and transmitted to the control unit 10, and is separately incorporated in the control unit 10. In the analog-to-digital converter (ADC) 11a, an analog signal that has not undergone a digital conversion step through the analog-to-digital converter (ADC) unit 50 is separately received and digitally converted to generate a comparison digital signal.

At this time, referring to FIG. 12, in the second monitoring step (S200), the digital conversion signal digitally converted in the analog-to-digital conversion (ADC) unit 50 in the digital conversion step (S50) and the analog of the control unit 10 - The comparison digital signal digitally converted in the digital converter (ADC) 11a is compared with each other in the control unit 10, and if there is an error greater than the set range, the control unit 10 may determine it as a digital conversion error.

Abnormal display step (S600)

Referring to FIG. 13 , the self-monitoring method according to another example may further include an abnormality display step (S600). At this time, in the abnormal display step (S600), if the server unit 60 cannot communicate with the communication unit 30 for more than the set time, the server unit 60 may display an abnormal signal or transmit an abnormal signal to the set manager terminal. there is.

In the above, the above-described embodiments and the accompanying drawings are not intended to limit the scope of the present invention, but have been described by way of example to help those skilled in the art understand the present invention. At this time, various modifications can be implemented obviously according to various combinations of the above components by those skilled in the art. That is, various embodiments of the present invention may be implemented in various modified forms according to various combinations of the above-described components without departing from the essential characteristics of the present invention. Therefore, the scope of the present invention should be interpreted according to the invention described in the claims and includes various changes, alternatives, and equivalent embodiments by those skilled in the art as well as the above-described embodiments.

1, 1a, 1b, 1c: Self-Monitoring System
10: control unit 11: MCU
11a: ADC 13: memory
20: watchdog unit 30: communication unit
40: power unit 41: circuit protection block
43: operating power regulator 50: ADC unit
51: ADC circuit 60: server unit
70, 70a~70f: sensor

Claims (17)

a control unit that receives and processes monitoring signals for monitoring an operating system, an operating device or an operating member;
a power unit supplying basic power to the control unit;
a communication unit which transmits at least some or all of the monitoring signals processed by the control unit to a server unit; and
A watch dog unit that monitors the supply of the basic power and the operation of the control unit and blocks data transmission to the server unit through the communication unit when an abnormality is detected,
The watchdog unit operates by receiving a separate power supply from the power unit, monitors the basic power supplied to the control unit, determines whether it is out of the set supply range, and checks whether the control unit is in a normal operating state. And, in each case where the basic power is out of the set supply range or it is determined that the control unit is abnormally operated, a holding signal is transmitted to the communication unit to block data transmission. Rebooting the control unit by sending a reset signal to the unit;
The control unit supplies power from the power unit provided to at least one or more sensors for detecting states of the operating system, the operating device or the operating member, or provided to the operating system, the operating device or the operating member to be monitored. monitors the state of the monitoring signal to the digital conversion error of the analog signal, and transmits a holding signal to the communication unit when the monitoring result indicates that there is an error in the supply power or the digital conversion error is determined to block data transmission,
Blocking of data transmission by transmission of a holding signal to the communication unit is performed by the watchdog unit when the basic power supplied to the control unit is out of the set supply range or when it is determined that the control unit is operating abnormally, and When the at least one or more sensors or the supply power provided to the monitoring target has a problem or the digital conversion error is determined, each is performed by the control unit,
The watchdog unit and the control After the data transmission of the communication unit is blocked by the unit, when the problem of the supply power or the digital conversion error that caused the blocking is resolved, the control unit resets the communication unit to reset the data transmission blocking state. Self-monitoring system, characterized in that to release.
delete In claim 1,
The watchdog unit has a separate counter, and the counter periodically receives a trigger signal from the control unit;
The self-monitoring system according to claim 1 , wherein the watchdog unit determines that the control unit is operating abnormally when the counter does not receive the trigger signal within a set time range.
delete delete In claim 1,
Further comprising an analog-to-digital conversion unit for digitally converting the analog signal provided for monitoring and transmitting the digital signal to the control unit;
The control unit has a separate analog-to-digital converter to separately receive the analog signal that has not been digitally converted by the analog-to-digital converter unit, convert it into a digital signal, and generate a comparison digital signal. Self-monitoring system, characterized in that the digital conversion signal and the comparison digital signal are mutually compared and if there is an error greater than a set range, it is determined as the digital conversion error.
In any one of claims 1, 3, 6,
A self-monitoring system characterized in that it is applied for condition-based maintenance of the operating system, the operating device or the operating member in a transportation device, power generation facility or production facility.
In claim 7,
The transport device is a railroad car,
The self-monitoring system is applied to any one or more modules of a condition-based maintenance system module for a vehicle wheel set, a condition-based maintenance system module for a vehicle driving motor, and a condition-based maintenance system module for a vehicle air conditioner, respectively, or A self-monitoring system, characterized in that applied to an integrated system comprising at least two of them.
In any one of claims 1, 3, 6,
The self-monitoring system, characterized in that the server unit displays an abnormal signal or transmits an abnormal signal to a set manager terminal when communication with the communication unit is not established for a set time or longer.
A watch dog unit operating with a separate power source monitors the basic power state supplied to the control unit that receives and processes the monitoring signal for monitoring the operating system, operating device or operating member, and the operating state of the control unit. 1 monitoring phase;
a data transmission step of transmitting at least a part or all of the monitoring signal processed by the control unit in a communication unit to a server unit; and
In the watchdog unit, a transmission blocking step of blocking data transmission to the server unit through the communication unit when an abnormality is detected in the supply of the basic power and the operation of the control unit in the first monitoring step; It is a method of self-monitoring,
In the first monitoring step, an abnormality in the supply of the basic power is determined based on whether or not the basic power supplied to the control unit is out of a set supply range, and within a set time range of a trigger signal periodically received from the control unit. Determining the operation of the control unit based on whether or not the reception is received;
In the transmission blocking step, in each case of an abnormal supply of the basic power and an abnormal operation of the control unit, a holding signal is transmitted to the communication unit to block data transmission, but when it is determined that the operation of the control unit is abnormal, the watch The dog unit transmits a reset signal to the control unit to reboot the control unit;
The self-monitoring method is provided in the control unit to at least one or more sensors for detecting states of the operating system, the operating device or the operating member, or provided to the operating system, the operating device or the operating member to be monitored. Further comprising a second monitoring step of monitoring a state of supply power and a digital conversion error of an analog signal among the monitoring signals,
In the transmission blocking step, when the monitoring result in the second monitoring step determines that there is an abnormality in the supply power or the digital conversion error, the control unit transmits a holding signal to the communication unit to block data transmission,
In the transmission blocking step, data transmission blocking by transmission of a holding signal to the communication unit is performed by the watchdog unit in each case of an abnormal supply of the basic power supplied to the control unit and an abnormal operation of the control unit. And when there is a problem with the supply power provided to the at least one or more sensors or the monitoring target or the digital conversion error is determined, each is performed by the control unit,
In the self-monitoring method, when the basic power supplied to the control unit returns within the set supply range within a set supply time or the control unit operates normally after the transmission blocking step, the watchdog unit and the After the data transmission of the communication unit is blocked by the control unit, when the problem of the supply power or the digital conversion error that caused the blocking is resolved, the control unit resets each communication unit to block data transmission. Self-monitoring method characterized in that it further comprises a block release step of releasing.
delete delete delete In claim 10,
The analog signal provided for monitoring is digitally converted in an analog-to-digital conversion unit and transmitted to the control unit, and the analog-to-digital converter separately built into the control unit does not go through a digital conversion step through the analog-to-digital conversion unit. Further comprising a digital conversion step of separately receiving and digitally converting the analog signal to generate a comparison digital signal,
In the second monitoring step, the digital conversion signal received from the analog-to-digital conversion unit and the comparison digital signal are mutually compared, and if there is an error greater than a set range, the digital conversion error is determined.
In claim 10,
When the server unit cannot communicate with the communication unit for a set period of time or longer, the self-monitoring method further comprises displaying an abnormal signal or transmitting an abnormal signal to a set manager terminal.
In any one of claims 10, 14, 15,
A self-monitoring method characterized in that it is applied for condition-based maintenance of the operating system, the operating device or the operating member in a transportation device, power generation facility or production facility.
In claim 16,
The transport device is a railroad car,
The self-monitoring method is characterized in that it is applied for condition-based maintenance for each of at least one or more of a vehicle wheel set, a vehicle driving motor, and a vehicle air conditioning device.